You are on course 312°T. To check the speed...

You are on course 312°T. To check the speed...

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Question 1 of 2066636ee928f7522a1c519468

You are on course 312°T. To check the speed of your vessel you should observe a celestial body on which bearing?

Question 1 of 20

66636ee928f7522a1c519468

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You are on course 312°T. To check the speed of your vessel you should observe a celestial body on which bearing?

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🔍 Key Concepts

• Speed check using a celestial body relies on maximum rate of change of bearing • The rate of change of bearing is greatest when the body is abeam (about 90° from your heading) • Relate each choice to your course of 312°T by finding the angular difference (relative bearing)

💭 Think About

• From a course of 312°T, calculate how many degrees off the bow each option is • Which option puts the celestial body closest to 90° off your heading (on either beam)? • Why is a body nearly abeam better for checking speed than one nearly ahead or astern?

✅ Before You Answer

• Compute the relative bearing of each option from 312°T (use 0–180° difference) • Identify which option is closest to 90° off your course • Eliminate any bearings that are nearly ahead (0°) or astern (180°), since those give poor speed checks

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